While Loop Extended

 

While Loop Extended

So far we've used break in the while True loop. break leaves the loop completely and runs the next unindented line of code. However, you may want to stop the code and start the loop from the top again. (This is ideal for building games!)

while True:

  print("You are in a corridor, do you go left or right?")

  direction = input("> ")

  if direction == "left":

    print("You have fallen to your death")

    break  

In the code above, the game runs and the user is asked if they want to go left or right. If the user chooses left, they fall to their death, and break will kick the user out of the loop.

The Continue Command

The continue command stops executing code in the loop and starts at the top of the loop again. Essentially, we want to kick the user back to the original question.

while True:

  print("You are in a corridor, do you go left or right?")

  direction = input("> ")

  if direction == "left":

    print("You have fallen to your death")

    break

  elif direction == "right":

    continue

  else:

    print("Ahh! You're a genius, you've won")

Adding continue will start the code from the start and ask the first question again: "Do you go left or right?".

The else statement refers to any input besides left or right (up or esc). Since the user is a winner, we do not want to use break or it would say they have failed.


Proceed to the Nearest Exit

The previous code continues to loop even after the user has won. Let's fix that with the exit() command

The exit() command completely stops the program and it will not run any more lines of code.

lets have an example 

while True:

  print("You are in a corridor, do you go left or right?")

  direction = input("> ")

  if direction == "left":

    print("You have fallen to your death")

    break

  elif direction == "right":

    continue

  else:

    print("Ahh! You're a genius, you've won")

    exit()

print("The game is over, you've failed!")

another example :- 

print("Let's play chutes and ladders. Pick ladder or chute.")

while True:

  print("Do you want to go up the ladder or down the chute?")

  direction = input("> ")

  if direction == "chute":

    print("Game over!")

    break

  elif direction == "ladder":

    continue

  else:

    print("Game over!")

    exit ()

print("Thanks for playing!")

problem solving :-

We are going to build a "Guess the Number" guessing game.

You are going to use a while loop and some of the concepts from the past few days.

1.Start by picking a number between 0 and 1,000,000. This will be your first variable.

2.Create a while loop to keep asking the user to guess your number.
3.If they are too low, tell them "too low." If they guess too high tell, them "too high."

4.If the user guesses correctly, tell them they are a winner (maybe add a fun emoji too!)
5. Count the number of attempts it took for the user to guess number. Make sure you only show that after they get the answer correct.

print ("One million to one")

print("")

guees_N = 89456

count = 0

while True:

  count += 1

  oneTime = int(input("Guess your number to match:"))

  if oneTime == guees_N :

    print("Correct")

    break

  elif  oneTime > 0 and oneTime > guees_N and oneTime-guees_N >= 5001 :

    print("too high")

    continue

  elif  oneTime > 0 and oneTime > guees_N and oneTime-guees_N <= 5000 :

    print("high")

    continue

  elif  oneTime >0 and oneTime < guees_N and guees_N - oneTime >= 5000 :

    print("too low")

    continue

  elif  oneTime > 0 and oneTime < guees_N and guees_N - oneTime <= 5000 :

    print("low")

    continue

  elif oneTime < 0:

    print("I don't want to play anymore")

    exit()

print("till run total guess",count)